Automatic machine tool



"Dec; 6, 1927. I 1,651,948

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L. G. DANlELs AUTOMATIC; MACHINE TOOL Filed April 17 1922 Sheets-Sheet :2

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Y L. G. DANIELS AUTOMATIC MACHINE TOOL Filed April 17 1922 I 6 sheets sheet f4 7 1\ s Q 9 O m 4 g Q g Q O Q o oo SQ Q o w v Q k h f" g Dec. 6, 1927. 1,16%,948

L. G. DANIELS AUTOMATIC MACHINE TOOL Filed April 17 1922 6 Sheets-Sheet f5 Dec. 6, 1927. 1,651,948 e. DANIELS v .wToMATic MACHINE TopL 'Filea April 17. 1922 s Sheet s-She et Te -Patented 15... 6,1927. I

PATENT OFFICE.

G. DANIELS, F ROCKFORD, ILLINOIS.

AUTOMATIC MACHINE TOOL.

Application filed April 17, 1922. Serial No. 553,761.

This invention relates in general to automatic machine-toolsin which a series of automatically controlled cutting operations are successively performed on a work-piece or on a multiplicity of work-pieces. More particularly, the invention is especially applicable to that type of machine characterized by a multiple spindle tool-carrier, a work-carrier adapted to, be indexed, and mechanism for automatically moving the tool-carrier for bringing the tools into and out of cutting relation to the work-pieces and for indexing the Work-carrier to successively move said workpieces into operative relation with the different tools, thereby to' perform a series of cutting operations on each Work-piece. The invention has further reference to automatic machine tools without limitation as to the number of tool spindles.

Machines of this character are intended primarily, as a labor saving factor and for promoting economy and uniformity in the production of parts which are made-in large numbers. It is desirable, therefore, that. the

machines themselves shall be capable of economical'" production, operation and maintenance. Hretofore, in machines of this type the. tool and work carriers have been operated by devices or mechanisms including trains of gearing, clutches, motion-compeneating devices, etc., which in turn have been controlled to operate in the desired sequence by control mechanism generally in the form of cams of various kinds. This intermediate operating mechanism has been of a more or less complicated nature, quite apt to get out of working order; and in practice it has been found torequire considerable attention for maintenance in proper running order. Furthermore,

cost of production of these machines.- .In the plesent invention, I'have very materially improved machines of this type by eliminating to a large extent said intermediate operating mechanism, thus simplifying the construction. greatly reducing the number of parts, securing more simple and direct action of fm-ce's, obtaining a higher degree of efiiciency in operation, and promoting economy in maintenance and upkeep of the machine. In other words, my object has been to auton'lat'ically control and operate the tool and v work carriers in a most direct and efficient 65 manner, and. to this end I employ a rotary such intermediate 0 crating mechanism adds considerably to t e cam device which not only controls but di- I rectly operates the tool and work carriers in the desired timed relation. This cam device is arranged in a particularly advantageous manner with relation to the tool and work carriers for moving the former back and forth inrapid approach, feed and rapid reverse movements and for indexing the latter. I also employ said cam device for operating alocking bar which looks the work carrier in indexed position. I

I have also aimed to'provide a novel mechanism for driving the tool spindles and for operating the tool-carrier and work-carrier in the desired sequence, by which the power may be transmitted in a most eflicient manner through the several trains of operating parts and by which the mechanism for operating the tool and work carriers will e driven from that for operating the spindles and may be disconnected at will from the latter.

Further objects are to provide a new and improved assembly of parts characterized by the interfitting of certain units to produce a rigid and substantial construction which insures against vibration under heavy duty; to improve the frame construction and assembly of parts with the view to economy in product1on;'to improve the means for operating the tool-carrier and the means for operating the work-carrier, .to improve the driving mechanism; and to provide an im-v proved means and system of lubricating the machine. f

Other objects and attendant advantages will be appreciated by as the invention becomes betterv understood by reference to the following description when considered in connection with the ac-- companying drawings, in which- Figure 1 is a side elevation of a multiple.

- spindle machine embodying my'inventiony Fig. 2 is'a top view of the machine with the top covers removed; v 4

Fig. 3 is a vertical sectional view taken substantially on the line 3-3 of Fig. 2;

Fig. 4 is a fragmentary horizontal sec-' tional view taken substantially on the line 44 of Fig. 3;

Fig. 5 is a vertical sectional view taken substantially on the line 5- 5 of Fig. 3;

Figs. 6 and 7 are horizontal sectional views taken substantially on. the lines 6-6 and 7-7,-respect1vely, of Fig. 3;

those skilled in the art Fig. 8 is an elevation of the parts shown at the right-hand end of Fig. 6;

Figs. 9 and 10 are diagrammatic developments of the cams on the top and periphery, respectively, of the cam-carrying device; and

Figs. 11 and 12 are detail sectional views taken on the lines 1111 and 1212 of Figs. 1 and 3, respectively.

In illustrating the principles of the prese'nt invention, I have taken as an example, a multiple spindle machine, in which the tools are advanced to the work in a rapid approach and a feed movement and are re tracted in a rapid reverse movement, and the work-pieces are carried in suitable chucks, fixtures or the like, supported on a carrier or table which is adapted to be indexed in step-by-step movements to thereby successively present the work-pieces to the different tools. Such a machine might be either horizontal or vertical, and in the present instance it is vertical. Furthermore, in machines of this type either the tool spindles or the work-holding chucks may be revolved, and in the present instance the spindles are revolved.

The frame of the present machine comprises, generally stated, a base 15, side column 16 fixed to the base, center column 17 center columns.

fixed to the base through the intermediary of a bracket 18, and a top structure 19 rigidly joining the upper ends of the side and The principal operating parts are a Work-table or carrier 21 supported on the base to revolve-about the center column, a tool slide or carrier 22 slidable lengthwise on the center column and carrying a plurality of circumferentially spaced tool spindles 23, and a rotary camcarrying device 24 (designated generally) for operating the work and tool carriers and other devices through a cycle of operations. The mechanism for driving the spindles, the variable speed mechanism for driving the cam-carrying device, the cam-carr ing device proper, and the parts operate by said cam-carrying device will be described sub stantially in the order named.

In a machine of this type, I prefer to employ an electric motor 25 as the source of power and to support this motor on the upper portion of the machine to enable to most direct connection with the spindles for driving the latter at constant speeds, each spindle having a definite speed," which may be different from the others according to the nature of its work. The spindle speeds I may be changed as will be resently seen;

and the motor 25 supports on the upper portion of the side column 16, has a spur pmion 26 meshing with a gear 27 fixed to .a horizontal drive shaft 28 journaled in bearing brackets 29 and 31 suitably fixed to the top frame structure. The drive shaft 28 dlsposed radially with respect to the center column, carries at its inner end a fixed bevel gear 32, which meshes with a central bevel gear 33 formed integral with a spur gear 34, these gears being mounted on a vertical shaft 30journaled in upper and lower bearings, as shown plainly in Fig. 3. The central spur gear 34 meshes with three equally spaced gears 35 fixed respectively to vertical shafts 36, 36 and 36" journaled in suitable upper and lower bearings, the former of which is carried by the bearing bracket 31 and the latter by the top frame structure. The shaft 36 is equipped at its upper end with a fixed spur gear 37 meshing with a gear 38 fixed to a spindle driving sleeve 39in which its respective tool s indle 23 is splined. Each shaft 36' an 36 is equipped at its upper end with a pair of spur gears 41 and 42 of different diameters meshing respectively with gears 43 and 44 which drive the two adjoining spindles. Each intermediate shaft 36 and 36 drives tWo tool spindles at different speeds, and any of the gears between the intermediate shafts and spindles may be changed for others of different ratio to thereby change the speed of the respective spindles. It will be seen that when the motor is in operation the spindles may be driven at definite constant speeds determined by the gearing described.

The variable speed mechanism Which will now be described for driving the cam-carrying device is located within the base and adapted to be driven from the horizontal drive shaft 28 through the agency ofa ver-' tical shaft 45 extending through the side column 16. As shown in Figs. 2 and 3, there is fixed to the drive shaft 28 a spiral gear 46 which meshes with a similar gear 47 loose on the shaft 45 and adapted to be connected thereto by means of the shiftable clutch element 48. A compression spring 49 tends to urge the clutch element 48 into engagement with a complemental clutch face on the gear 47 and is adapted to be moved out of such engagement by means of a hand lever 51, Fig. 1, at the side of the machine. This hand lever connected to a rock shaft 52 which carries a yoke 53 for shifting the clutch element, is adapted to be locked in the clutch disengaging position by any suitable means, such for example as that shown in Fig. 11. consisting of a spring wire loop or hook 54 on the lever engageable over the grooved end of the stud 55 fixed to the side column. It will be manifest that the shaft 45 and all parts driven thereby, may be disconnected from the drive shaft 28 by the operator swinging the hand lever 51 in a clockwise direction, Fig.- 1, and engaging the loop 54 over the stud 55. thereby locking the clutch in disengaged position under pressure of the spring 49. This affords a positive lock which requires a definite act on the part of the operator brackets 72 and 73. An anti-friction thrust to engage the clutch namely, that of re-- bearing 74 isinterposed between each end leasing the loop 54 from the stud 55. ofthe cam-carrying body and the adjacent The upright shaft 'journaled in suitbearing bracket. The cam-carrying body 1 able bearings at its upper and lower ends, has upper and lower annular portions 75 1s equipped at its latter end as shown in and 76 heavily reinforced by radial ribs and Fig. 5, with a bevel gear'56, which meshes adapted for carrying in opposed relation with a gear 57 fixed to a horizontal constant upper and lower cam plates 77- and 78. speed shaft 58 suitably journaled in the base. These cam plates which may be of sectional 10 The shaft 58 carries a. fixed spur gear 59 segmentalgform are removably-secured' to 7 meshing with a gear 61 loose on a variable said body portions and 76 and define an speed shaft 62, suitably journaled below and annular cam-way in which operates a roller parallel with the constant speed shaft 58. A 79.v This roller or cam follower connected clutch element 63splined on the shaft 62, is with the tool-carrier as will be presently de- 16 constantly urged by a compression spring 64 scribed, is adapted to be moved in a Vertical into engagement with acomplemental clutch plane by said cam plates for moving the face on the gear 61. Said variable speed tool-carrier vertically. Said rotary device shaft 62 carries a fixed worm 65 which meshes also carries'on its upper portion 75 a roller with'a Worm wheel 66 fixed to the rotary 81, Fig. 4, for .operating'a camon'thework- 20 cam device which will be described hereincarrier for indexing the latter, and cam 35 after. Thefconstant speed shaft 58 .alsocarplates designated generally by 82 and83 ries aloose spur gear 67 ofgreater diame; for respectively operating a tablevlocating ter than the gear 59 and in mesh with a and-locking bar\ and for controlling the va. gear 68 fixed to the shaft 62. The gear 67 riable speed mechanism for driving the cam may be connected to or disconnected from the device, all of which will be presently more shaft 58 by suitable means, such as a clutch fully described. In the event that it is deelement 69 splined on the shaft 58 and movsired to index theiwork-carriertwo stations able into and out of engagement with a cominstead of one to each'revolution of the cam plemental face on said gear 67.v When endevice, an additional roller similar to the 'gaged as shown, the shaft 62 will be driven roller 81 will beemployed, the supporting from the shaft 58 at a higher speed than. the bracket for which .Iattach to the cam delatter and the teeth on the clutch element 63 vice bybolt's' which enter the holes 112. 'The will simply run ahead of those on the gear cam 82 will be: lengthened accordingly so 9 61. It follows that by engaging the clutch* that the locking bar'will be released at the element 69, the cam-carrying device will be proper time for entering the second socket driven at a relatively fastspeed through 107. It will be obvious that the two rollers the"gears' 67 and 68, and that upon disen- 81 will successively index the table, advancgaging said clutch element, said device will ing each work holder two'stations. be driven at a slower speed through the The partsoperated by said cam-operating ears 59 and 61. The clutch element 69 will device' comprising, generally stated, the

automatically controlled. to produce said means for moving the 'tool carriage back and fast and slow speeds bymoveme'nt of said forth, the means for indexing the workeam-carrying device as will be described carrier, the means for withdrawn and rehe'reinafter. The Worm 65 and consequently leasing the locating and locking er, and 45 the cam device maybe operated by hand inthe means for controlling thevariablespeed dependently of the power drive as is desired driving-mechanism, I will now describe in when assembling the machine and when setthe order named. v s ting up the tools. This. is done by means I The cam roller 79 is carried by what I of a hand crank 60 at the control side of the term a connecting rod, which reaches upmachine, adapted for turning a shaft which wardly through the center column and is carries a gear 70 meshing w1th the gear 67. connected to the tool-carrier. This con- The cam-carrying device 24 mentioned necting rod, in the present instance, is above and. shown in Figs. 3, 4 and 6, may formed of anupper part 84, threadingly conbe of any construction suitable for carrying nected to a lower roller-carrying part desigcams for performing the functions desired. .nated generally by 85. Said lower, part 85 In view, however, of the enormous pressure is medlally shaped to provide diametrically t-hatmust be transmit-ted for the feed in a opposed arms 86 and 87, the former of heavy duty machine of ,this type, -I' have which, as shown in Fig. 6, embraces the devised and arranged a device 0 distinctly roller 79' and provides for carrylng antl- 60 novel construction, especially adapted for friction bearings 88 and 89 for, and at the the conditions and requirements in the inouter and inner ends of the cam roller 79, stant case. l This device comprises .aheavy and the latter of which carries similar outer cam-carrying body fixed to a vertical shaft and i'nnhr bearings 91 and 92'for a guide 71 journaled at itsupper andlower ends roller 93. The upper and lowerends of said n suitable anti-friction hearings on the part 85 are guided bearings 94 and 95,130

with its axis of rotation in radial alignment with the axis of the rotary cam device. The upperpart 84 of said connecting rod is connected to the tool carriage in any suitable manner, as for example by threaded connection to a part 80 having diametrically opposed arms reaching through longitudinal slots in the center column and rigidly bolted to the carriage proper. The connecting rod is made in two parts mainly for economy in manufacture and for a convenience in assembling the machine. The cam roller 79 and the guide roller 93 are in-co-axial relation, and the purpose of the guide roller is to maintain atheoretical line contact be tween the cam roller and either of its cam surfaces in radial alignment with the axis tially equal according to the direction of thrust. providing a bearing for of the rotary cam device, and therefore, in fiat contact with either of said cam surfages 3 each end of the cam rollers 79, the cam thrust will be substanat both ends of the roller, consequently there will be no tendency for the roller to tilt and in time cause uneven wear, which would not only impair theaccuracy and efficiency of the machine, but would undoubtedly result in injury to the parts. This cam and roller construction per se, forms the subject matter of my co-pending application Serial No. 460,045. The cam plates 77 and 78 are designed to operate the tool-carrier through the direct intermediary of the cam roller 79 and connecting rod at variable speeds and in timed relation with indexing of the work carrier. It will be seen, therefore, that these cam plates not only control the forward and reverse movements of the tool-carrier but actually produes and transmitsuch movements. The cam plates will therefore, be shaped to advance and retract the tool-carrier at the proper times and speeds to suit the conditions and requirements of the work at hand, or of any articular class of work. To facilitate said cam operation of the toolc-arrier, especially in a vertical machine, any suitable means may be employed for counterbalancing the weight of said tool-carrier an its parts. In the present case, I employ a weight 90 for this purpose, this weight being adjustably suspended from a lever of the third class, which is connected by means of a. chain 100 trained over suitable sprocket vertical guide plates 97 bewhich the roller wheels and connected to the tool carriage from overhead. The tool carrier in its vertical movement is guided on the center column 17 and a laterally reaching guide arm 110 fixed to the carrier and associated with a suitable guide surface on the side column 16, serves as an additional guide for preventing displacement of the carriage rotatably about said center column.

Indexing of the work-carrier 21 is accomplished in asimple and novel manner by the provision of a star shaped cam designated generally by 98, fixed to said carrier and adapted to be operated by the roller 81 on the cam-carrying device. This cam has six circumferentially spaced duplicate sections, each adapted for moving the workcarrier through one-sixth of a revolution upon each complete revolution of the cam device. These cam sections correspond with the position of the work-holders on the table or carrier, so that each time the latter is moved through one-sixth of a revolution, the work-holders will be advanced from one station to another. Each cam section has a radially disposed effective surface 99 against 81 is adapted to bear. Viewing Fig. 4, it will be seen that when the cam-carrying device is revolved in a counter-clockwise direction, its roller 81 will engage the outer end of the cam surface, and moving inwardly along said surface will revolvc the work-carrier in a clockwise direction in a variable movement, accelerating from the start to a midway position and then gradually slackening until the locating bar engages-in a locating socket in the table as will be presently described. During this indexing movement, it will be observed that when starting the table the cam-carrying device has the greatest leverage advantage by reason of the roller 81 operating on the outer end of the surface 99, and that as the motion of the table is accelerated the leverage advantage decreases. This permits indexing of the table without jar and sudden excessive strains on the driving parts.

The locating and locking bar 102 radially disposed with respect to the table and mounted to slide lengthwise in suitable bearings 103 and .104, is constantly urged inwardly against the periphery of the table by a spring 105. The nose 106 of the locating bar is adapted to'enter any of the sockets 107 in the periphery of the work table, which sockets are equal in number to the work-holders and similarly spaced. The locating bar is adapted to be withdrawn by the action of the.cam-82 on the cam-carrying device. This cam has an inclined surface 108 adapted to engage a depending roller 109 on the bar for withdrawing the latter. As shown in Fig. 4, the locating bar will be withdrawn before the table commences to index, and the cam 82 will leave the roller 109 before ranged that the scribed above is controlled as to duration of the fast and slow speeds by the cam 83,- which act-uates means for disengaging the clutch element 69.

a lever 114, fixed to an upright shaft 115, which is suitably journaled on the frame and carries a yoke 116 for shifting the clutch element 69. A spring 117 connectedwith the shaft 115 urges the latter in a clutch-engaging direction. In Fig. 4, the cam follower 113 is in the'position with the high speed clutch engaged, and it will be moved by the'inclined surface 118 of the cam 83 to disengage said clutch and allow the slow speed clutch to function as described above. It will be observed that the cam plate 83 is of considerable length and the slow speed will 'be maintained until the follower roller leaves the heel 119 of said cam.

- A cycle of operations is as follows: Assuming the machine in operation, the stage 83 and carried by shown in the drawings is at the commence-. ment of an indexing movement with the loeating bar withdrawn and the tool-carrier in elevated position. This stage is shown diagrammatically in Figs. 9 and '10, which contain a development of the cams on the cam-carrying device and show the position and relative relation of the immediately operated parts. The cams and cam plates travel to the right with respect to the cam followers shown in these views. In this positi0n,,the cam-carrying device is propelled by the fast speed clutch, that is, at the rapid traverse speed, by reason of the .cam roller 113 being free from the cam 83, as explained above. Assuming this to be the beginning of the cycle, it will be seen that the tool-carrier will be held stationary in elevated position during the table-indexing movement by reason of the straight -camway 120, Fig. 10. At the completionrof this indexing operation and during the rapid traverse movement of the cam device, the roller 79 will be operated by the inclined cam surface 121' for advancing the tools to the work in a rapid approach movement. The present cams are so designed and arrapid approach is relatively short, the lineal travel of the tools being approximately three-fourths of an inch. At

of the cam 83, thereby This means comprlses a roller 113 adapted to be actuated by the cam the completion of the rapid approach, the roller 79 enters the feed cam-way 122 and the roller 113 will be operated by the cam surface carrying device to the slow speed, which will be maintained by the cam plate 83 throughout the feed. During the feed, the finished Work-piece at the loading station will be removed by the attendant, and a. new workpiece substituted. At the end of the feed the tools will be held by reason of dwell portion 123 of the cam, for removing any tool marks from the cuts. At the end of this dwell, the roller 113 will leave the heel 119 of the cam device; During this rapid traverse of the cam device the tools will be retracted in a rapid reverse movement by the action of the cam surface 124. As soon as the tools have reached the elevated position,

the locking bar will be withdrawn by the action of the cam surface 108 on the roller 109.

This completes the cycle of operations, and inasmuch as the drive for the cam device is continuous, the cycle will be continuously repeated until stopped by operation'of the hand lever 51. The operations controlled by the cam device may, of course, be changed and varied byproper design and location of the cams. In certain cases Where the complete cycle is of relatively short duration, say from 20 to 30 seconds, ing the rapid traverse drive that is, the cam 83 and parts operated thereby, may be omitted, leaving the cam device propelled at a constant speed.

From the foregoing,'- it will be manifest that the work and tool carriers are directly operated by a rotary cam device, thus eliminating the more or less complex mechanisms heretofore employed in machinesv of this type for operating the work and tool carriers. As a result of this principle of operation, a saving of hundreds of parts is effected without depreciating the capacity or'scope of the machine. Instead, by eliminating the various trains of gearing, clutches, motion-compensating devices and other mechanisms which are generally controlled by cam devices and function to operate the work and tool carriers, I have by the-present invention greatly simplified both 118 to reduce the speed of the camstepping up the speed the parts employed for producthe construction and operation of machines opening 126 in the base. As a result of this construction, any lateral strains do not have a loosening or shearing efl'ect on the bolts which secure the bracket 18 to the base. In a similar manner the flange 96 on the lower end of the center column seats in the top of the bracket 18, and the upper end of the center column seats in a complemental annular recess 127 in the top structure. The upper and lower bearing brackets 72 and 73 for the trunnion ends of the cam-carrying device are similarly mounted with the result that the cam device which works against great pressure, especially during the feed, is supported in a very substantial manner.

Still another feature is the oiling system, by means of which everly bearing and operating part requiring ubrication will be automatically lubricated by gravity feed. More particularly, the oil is delivered by means of a pump 128 to an overhead supply pipe 129 having discharge leads 131, 132 and 133 which empty into reservoirs formed by the top structure, and from which reservoirs the oil either overflows or otherwise discharges to bearings at a lower elevation From these bearings or parts requiring hebrication, the oil gravitates to intermediate reservoirs, such for example as the reservoir 134 in the side column 16, the reservoir 135 in the center column, the bottom of which is defined by a packing 136 the reservoir 13'? on the rear wall of the side column and the reservoir 139 beneath the bracket 18, from whence it is again distributed through discharge leads and the like to the bearings and parts at lower elevations. In the case of the latter reservoir, however, the oil instead of gravitating to lower bearings will be forced by the down stroke of the connecting rod up through the oil passage 139 in said rod and laterally to the bearings for the cam and guide rollers 79 and 93. A check valve 141 prevents back flow from this reservoir. The various oil holes and leads are clearly shown on the drawings.

It is believed that the foregoing conveys a clear understanding of the objects prefaced above, and while I have illustrated but a single working embodiment it should be understood that considerable change might be made in the construction and arilangement without departing from the spirit and scope of the invention as expressed in the appended claims.

I claim:

1. In a multiple spindle machine tool, in combination, a base housing, an upstanding column thereon, a horizontal indexing work table revolubleon the base housing about the column, a tool-carrier guided on the column above the work table, a rotary camcarrier in the base housing having opposed cams, table indexing means on said cam carrier, a cam roller interposed between said cams, and a connecting rod connected to the cam roller and reaching upwardly through the column and connected to the tool carrier to transmit vertical movement to the tool carrier from rotative movement of the cam carrier.

2. A multiple spindle machine tool as set forth in, claim 1, including a guide roller on the connecting rod having guiding contact with the base housing, the cam roller and guide roller being located on opposite sides of the connecting rod on axesa radial with respect thereto.

A multiple spindle machine tool as set forth in claim 1, including a guide roller on the connecting rod having guiding contact with the base housing, the-cam roller and guide roller being coaxial and disposed on opposite sides of the connecting rod.

l. 1n a multiple spindle machine tool, in combination, a base housing, an upstanding column thereon, a horizontal work table rotatable on the base housing aboutthe column, a tool'carrier guided on thecolumn above the work table, a rotary cam device in the base housing. means operated by the cam device extending through the column for inumriing iced movement to the tool-carrier, ant mechanism for imparting slow and fast movement. to the cam device.

5. in a multiple spindle machine tool, 1n combination, a base housing, an upstanding column thereon, a horizontal work table rotatable on the base housing about the column, a tool-carrier guided on the column above the work table, a rotary cam device in the base housing, means operated by the cam device extending through the column for imparting feed movement to the tool carrier, mechanism for imparting slow and fast movement to the cam device, and means on the cam device for controlling the periods of said movements.

6. In a machine of the character described, the combination of a frame column, a rotary work-carrier and a reciprocable tool-carrier on said column, a rotary camcarrying device, a connecting rod in said column connected with the tool-carrier and 1 device for reciprocating said carrier, means directly operated by said device for indexing the work-carrier, a lock pin for locking the work-carrier in any indexed position, a cam on said device for directly operating said lock pin to withdraw it from the work-carrier, mechanism for re volving said device at different speeds, and a cam on said device for controlling said mechanism.

7. In a machine of the character described. the combination of a rotary workcarrier, a frame column concentric therewith and about which said carrier revolves, a tool carrier reciprocable on said column, a conoperated by said ating said cam roller to reciprocate the toolcarrier, 'and'means for guiding the guide roller 'tovmaintam the cam roller lnrproper relation and adapted tofbe relatively indexed, a center column reaching upwardly from the work-carrier and upon which the tool-carrier"is'slidabIe, a single rotatable cam-carrier below the work-carrier having opposed-cams, and a connecting rod having a roller operated by said cams and reaching upwardly through said column and connected to the tool-carrier for imparting feed movement thereto.

9. In a multiple spindle machine tool, in combination, a base housing, a horizontal rotary Work table thereon, an upright column structure on the base housing including. a top housing overreaching the work table, a plurality of tool spindles mounted on said upright housing structure above the work table and vertically movable" with respect thereto, gearing in the top' housing for driving said spindles, mechanism in the base housing for indexing the Work table, a rotary cam device for moving the tool spindles vertically, and a prime mover mounted on the upright housing I to said spindle gearing and the rotary cam device for operating them in timed relation.

,1 10. A multiple spindle machine tool asset forth in claim 9 in device is located in the base housing and operates the indexing mechanism.

11. A multiple spindle machine tool as set forth in claim 9 in which the rdtary cam which the rotary cam dQWCG is located 1n the base housing and 1s connected tothe tool spindles by a connecting rod extending upwardly through the center of thework table.

13. In a machine of the character described, in combination, a base housing, a horizontal rotary work table thereon, an upright column structure on the base housing, tool spindles ,movable vertically on the column structure above the work table, a rotary the tool spindles for moving them vertically, a worm gear in the base housing coaxial with and connected to the cam device for rotating it, a driving worm meshing with said 7 the base housing including feed gearing and rapid traverse gearing and controlled by-the cam device'for operatively connecting either of saidgearing to the driving worm.

14. In a machine of the character described, the combination of a base, a side said top structure and base respectively, a rotary Work-carrier and a reciprocable toolcarrier on said column, and mechanism for indexing said work-carrier and reciprocating said tool-carrier in '15. In a machine of the character described, the' combination of a base, a side column and a top structure in rigid relative relation, a' column having an interfitting connection at its upper. and lower ends with said top structure and base respectively, a rotary work-carrier and a reciprocab'le toolcarrier on said column, mechanism for indexing said Work-carrier and reciprocating said tool-carrier in timed relation, a rotary cam device journaled in fittingcon'nection with the base, and means operated by said cam device for indexing the work-carrier and reciprocating the tool-car rier.

16. In a machine of the character described, the combination of a base housing, a center column fixed thereto, a rotary worksaid column,

a rotary cam device within said base housing Worm geaiyand driving mechanism in parts having intera i fixed between the basehousing and said top i fixed to said side column, a center column fixed between the base housing and said top structure by means including a bracket within the base housing for supporting said cenhousing,

aslde column fixed thereto, a top structure ter column, a rotary work-carrier and a reciprocable tool-carrier concentric with said center column, a rotary cam device within the base housing, mechanism for revolving said device, and means operatedby said de vice for reciprocating the tool-carrier including a part carrying a cam follower and guided above said follower in the center column and below said follower in the column-supporting bracket.

19. In a machine of the character described, the combination of a base, a side column and a center column fixed to the base, a top structure fixed to said columns, a rotary work-carrier and a reciprocable tool carrier on said center column, tool spindles for said toolcarrier, mechanism in said top structure for driving said spindles, mechanism in the base for indexing the work-carrier and reciprocating the tool-carrier, said top structure providing an oil reservoir, oil reservoirs at a lower elevation in said side column and center column, and means whereby oil may gravitate from said upper reservoir to said lower reservoirs and to bearings and operating parts at elevations lower than said reservoirs.

20. A multiple spindle machine tool comprising, in combination, a base housing, an upright column thereon, a rotary work table on the base housing rotatable about said column, an upright housing structure on the base housing including a top housing overreaching the work table and connected to said column, a plurality of vertical spindles above the worktable, spindle driving gears in the top housing, a rotary cam device in the base housing, means operated by said cam device extending upwardly through said column and connected to the tool spindles for moving them vertically, and mechanism for rotating the tool spindles and cam device.

21. In a multiple spindle machine tool, the combination of an index work-carrier and a reciprocable multiple spindle toolcarrier, a rotary cam-carrier having opposed cams, a roller interposed between said cams and connected with said tool-carrier for imparting feed and return movements thereto by operation of said cam-carrier, and a guide roller for maintaining the cam roller in predetermined relation to said cams.

In a multiple spindle machine tool, the combination of a rotary work-carrier and a multiple spindle tool-carrier in concentric relation, a rotary cam-carrying body havlng annular axially spaced cam-carrying portions, cam plates attached to said portions and defining a camway,*a roller disposed in said camway and adapted to be moved back and forth by said cams, and a connection between said roller and the toolcarrier for transmitting feed and return movements thereto including a supporting bearing for the roller at each end thereof for maintaining its face in parallel relation to the cam faces.

23. In a multiple spindle machine tool, the combination of a rotary work-carrier and a multiple spindle tool-carrier in concentric relation, a rotary cam-carrying device having opposed changeable segmental cam plates, a roller interposed between said cam plates and adapted to be moved back and forth thereby, and a connection between said roller and the tool-carrier for imparting feed and return movements thereto, including means reaching through the cam way and providing support for the roller at the inner sde of the cams.

24. In a multiple spindle machine tool, the combination of a work-carrier and a multiple spindle tool-carrier adapted to be relatively indexed, and means for relatively moving said carriers for effecting the feed comprising a rotary cam device having opposed cams, a cam roller interposed between said cams and adapted to be moved back and forth by, rotation of said device for transmitting the feed movement, and a guide roller co-operating with said cam roller for maintaining it in predetermined relation to the cams.

25..ln a multiple spindle machine tool, the combination of a work-carrier and a multiple spindle tool-carrier adapted to be relatively indexed, and means for relatively moving said carriers for effecting feed and return movements comprisin opposed rotary cams, a roller interpose between said cams, and means revolubly supporting the roller at the inner and outer sides of the cams for holding its face parallel with the cam faces, the roller being operated by the cams for transmitting said feed and return movements.

26. In a multiple spindle machine tool, the combination of a work-carrier and a multiple spindle tool-carrier adapted to be relatively indexed, and means for relatively moving said carriers for effecting feed and return movements comprising a rotary camcarrying body having integrally united, annular cam-carrying portions reinforced, by radially disposed ribs, segmental cam plates removably attached to said cam-carrying portions and defining a camway, and a roller disposed between said cam plates and adapted to be operated thereby for transmitting said feed and return movements.

27. In a multiple spindle machine tool,-

the combination of a work-carrier and a multiple spindle tool-carrier adaptedto be relatively indexed, and means for relatively moving said carriers for effecting feed and return movements comprising a rotary camcarrier having opposed cams, a roller interposed between said cams, and means supporting said roller in operative relation to a supporting bearing at the inner and outer r ends of the roller for maintaining its face parallel to the face of said cams, and means including a guide roller for maintaining the axis of the cam roller in a plane radial with respect to the cam-carrier.

28. In a machine of the character described, the combination with a frame, a worktablethereon, and a tool carrier disposed in spaced relation to the Worktable, the one indexing and the other reciprocating in the operation of the machine, a rotary cam carrier for producing the reciprocating motion, a worm gear for rotating the carrier, a worm meshing therewith, a shaft for turning the worm, a parallel shaft for transmitting the drive thereto, and two sets of gears connecting said shafts for driving the worm attwo different speeds for feed and traverse. V

29. A machine as set forth in claim 28 wherein one of the sets of gears is changeable to vary the rate of feed.

30. A machine as set forth in claim 28 wherein both sets of gears are constantly in mesh, either set of ears being arranged to be thrown selective y into action, the connection between a gear of one of said sets with one of said shafts being such that overrunning occurs when the other set of gears is in action.

31. A machine as set forth in claim 28 ineluding means on the carrier for indexing the Work table, and locking and unlocking the same.

LEE DANIELS. 

